Note 22 — HYPHENED AND NON-HYPHENED WORDS[21]

‘The hyphen is often used when a writer wishes to mark the fact that he is using not a well-known compound verb, but re- as a living prefix attached to a simple verb (re-pair = pair again); also usually before e (re-emerge), and sometimes before other vowels (re-assure, usually reassure); also when the idea of repetition is to be emphasized, especially in such phrases as make and re-make.’—The Concise Oxford Dictionary (1911), p. 694.